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2 years ago

What is the y intercept of the line 2x + 5y = -10? a.2 b.-2 c.5 d.-5

Mathematics

2 answers:

sladkih [1.3K]2 years ago

7 0

Answer:the y intercept is when x=0 0+5y=-10 y=-2
hope this helps:D

plz give me brainiest

mafiozo [28]2 years ago

6 0

The y intercept is when x=0
0+5y=-10
y=-2

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lbvjy [14]

Answer:

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Step-by-step explanation:

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2 years ago

Twice the difference of a number and 9 equals 8

ladessa [460]

Answer:

13 is the number.

Step-by-step explanation:

Given:

Twice the difference of a number and 9 equals 8.

Let the unknown number be 'x'.

Therefore, as per question:

The difference of 'x' and 9 = $x-9$

Twice the difference means 2 times the difference. So, we multiply 2 to the difference. Therefore,

$2(x-9)$

Now, the above expression is equal to 8. So, we equate the above expression to 8. This gives,

$2(x-9)=8$

Solving for 'x', we get:

Using distributive property of addition and distributing 2 inside the bracket. This gives,

$2\times x-2\times 9=8\\\\2x-18=8\\\\2x=8+18\\\\2x=26\\\\x=\frac{26}{2}=13$

Therefore, the unknown number is 13.

Now, we can verify our answer.

$2(13-9)=26-18=8$

Therefore, the answer is correct.

3 0

3 years ago

-2x+4y= 12 3x+7y= 18 last one greatly appreciated

LenaWriter [7]

Value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Step-by-step explanation:

We need to solve the system of equations given.

$-2x+4y=12\\3x+7y= 18$

Solving

Let:

$-2x+4y=12\,\,eq(1)\\3x+7y=18\,\,eq(2)$

Multiply eq(1) by 3 and eq(2) by 2 and add both

$-6x+12y=36\\6x+14y=36\\-------\\26y=72\\y=\frac{72}{26}\\y=\frac{36}{13}$

Putting value of y in equation 1

$-2x+4y=12\\-2x+4(\frac{36}{13})=12\\-2x+\frac{144}{13}=12\\-2x=12-\frac{144}{13}\\-2x=\frac{12*13-144}{13}\\-2x=\frac{12}{13}\\x=\frac{-6}{13}\\$

So, value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

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3 years ago

पायप<br> In a school of 300 students, how many would you expect to be left-handed

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150 students. there are two hands. therefore, 50% chance of being left handed, 50% chance of being right handed. 50%= half. half of 300=150. 150 students should be expected to be left-handed.

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Your answer will be letter B

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